Traffic marker



April 9, 1929. R. NATER ET AL 1,708,369

TRAFFI C MARKER Filed Nov. 1926 Patentec. Apr. 5:3, 19.29.

1,708,369 rarely-r OFFICE.

RUDGLErI HATER, Q1 LQNDGI'I, AND .FTILLIAIVII BEIGE, OI? KENSINGTON, LONDON. ENGLAND, AfiilSIGIlGRS TQ ROAD MARKS LIMITED, OF LONDON, ENGLAND.

TRAFFIC MARKER.

Application filed November (-2, 1828, serial No. 146,778, and in Great Britain November 10, 1925.

This invention relates to trailic control and like indications applied to read and similar surtaces l its principal object is to provide improve c 4 for producing such indications in a form which will at all times be easily legible and capabie of resisting dei'acemen 1 and extreme wear. The improved means is especially applicable to the produc- Lion of the well known white lines for demarking the areas to be used by oppositely moving streams oi vehicular traiiic, but is also adaptable to other indications including ieitered, worded, or numbered signs.

1 :cording to our invention the indications or igns are produced by :ulixing metallic discs or plates of suostantialiy, circular form. to the road snriace or to blocks embed-fled. therein. The plates which must be of a different color "from the road surface are arranged to interlock with one another andv may be secured in place by spikes, screws or equivalent means. lii hcre the road surface is oi such a nature as to prcciudc a secure hold being had by direct means, connection may be had by driving the spikes or screws into wood, concrete or other clocks en'ibedded in the road surface.

.ln carrying this invention into practical effect plates 0? circular iforiu composed of a non-rusting white metal are placed together to form the required si n and secured by il screws or like in ans driven into the road where wood paving is employed or into plugs or blocks embedded in the road surface where a macadam, asphalt or like surface obtains. The plates are each in the form of a peripherally notched disc rendering possible the interlocking of adjacent plates so as to prevent their rotation about central tastening means. With this end in. view discs having a lenticula." segment removed from the edge to form a recess may be recommended, each disc fitting into the recessed portion of the adjacent disc.

To provide for increased visibility and hard. wear and to protect the fastening means the plates are preferably made of substantial thickness at the center and reduccdin thickness towards the periphery so that their contours merge gradually with those of the road surface. As spikes or screws are to be employed for fixing the plates in position each may be formed with one or more shouldered apertures to receive such fastening means with their heads either sunk below or flush with the surface of the plate. It desired the plates may be made with integral spikes or anti-shear pins on their undersides as additional fixing means.

lnsome cases it may be preferred to secure the discs to a concrete mass or blocks in the road bed in which case screws engaging nuts; in the concrete may be used or lag or other holding down bolts adopted.

Hard white metal and stainless steel may be n'ientioned as n'iaterials suitable for the nianutacture of the plates especially where they are to be used in connection with the well known white line. Other hard metals of a bright, non-rusting character may however be applied to this purpose, preference being given to a metal which would enable the plates to be made in one operation as by casting or die casting methods.

1 accompanying sheet of illustrative 1 is'a side elevation of a single elea so-called white line indicator cond according to this invention and Figure 2 is a plan of the same.

As shown the element consists of a domed or disc a which is made con'iparatively is at the periphery and has its upper surce made slightly domed or convex at b, and flattened at the central portion 0. The underside of the disc is flat and has four downwardly projecting spikes (l, for driving into the road surface but it will be evident that the nun'iber of spikes may be varied. In the :late

cent-er ot the disc a countersunk aperture 6 formed for the reception ot a fastening screw shown partly broken away. In some cases however the screw 7" may be replaced by an integral fixing spike which would be of greater length than the spikes d.

In the construction shown the element or said discs being -adapted to ,be laid edge to whereby any edge portion of any disc except the notch thereof may be snugly received :in the notch of the next adjacent disc, thereby causing each disc to assist in anchoring its ineighbons and iflillowing the discs to jointly extend in any (desired direction or directions,

and means for securing thepindiyidua'l discs tothe street. r

2. in :a ,means ifor marking ,a street with lines 101' -othericharaeters, a plurality of solid,

fiatwbettomed and flat-topped slightly domed discs of uniform'si-ze and donmed of non- ,ear-rosiaie metal adapted to be continuously polished by vehicle traflic passing thereover, said :disos ibeing adapted :to be laid edge to edge to jointly form the desired marking, 7

each disc being of substantially circular out line .With the exception of a relatively small portion of its circumference; said portion *being formed into 'a notch Whose edge Wall is formed on. a radiusequal' to that of the disc, whereby any edge portion of any disc except the notch thereof may be snugly received in the notch of the next adjacent disc, thereby causing each disc to assist in anchoring its :neighbors and :allowingthe discs to jointly extend inanydesired direction or directions, xcentral lasteners for securing the individual discs upon the street, and anti-shear pins 1n tegral with and projecting downwardly from the d-iscs,-said-pins beingadapted to be forced into the street.

In testimony whereof they have afiixed their signatures. I a

RUDOLPH NATER.

WILLIAM 

